9
B. pH Calibration
The 6377MB/6377BEU uses up to 5 point calibration.
[
Note:
If the device requires to calibrate more than one
calibration point, the first calibration point must be 6.86/7.00
pH.]
1. Calibration with an ATC/Temp probe in the pH-AUTOLOCK
mode.
a. Turn the unit on. In the pH mode, press
“Clear”
key for 5
seconds, all LCD elements will lit up. The meter clears all
calibration values stored in internal memory.
b. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit.
c. Press
“Mode”
key to go to pH-AUTOLOCK mode. “ATC”
icon, “pH” icon and “AUTO” icon will lit up. The "CAL" icon
begins to flash.
d. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution. Allow temperature
reading to stabilize. Then press and hold “
Stand/Cal
” key
for 2 seconds to calibrate. The “WAIT” icon will flash until
the unit detects a stable reading. Once the unit calibrates
the first point. The selected buffer will lit up while two other
selectable buffers start to flash. The unit is ready to be
sloped at the second buffer if the first buffer solution is 6.86
or 7.00 pH.
[
Note:
At this moment, press the
“Mode”
key, the unit will
exit the calibration mode. Single point calibration is
complete.
To continue with two or more point calibration, the first
buffer solution has to be either 7.00 or 6.86 pH.]
e. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the second buffer solution (either
4.00/4.01 pH or 9.18/10.01 pH corresponding to the
flashing number on display). Allow temperature reading to
stabilize. Then press
“Slope/Enter”
key to calibrate. The
“WAIT” icon will flash until the unit detects a stable reading.
Once the unit calibrates the second point. The selected two
buffers lit up and the remaining buffers start to flash. The
unit is ready to be sloped at the third buffer.
[
Note:
At this moment, press the
“Mode”
key, the unit will
exit the calibration mode. Dual point calibration is
complete.]
